Window.



W. L. BLISS.

WINDOW.

APPLIOATIO] FILED SEPT. 14, 1905.

Patented May 10, 1910.

m M 35) lmadrtwmp L-i To all whom it may concern:

act description.

UNITED STATES PATENT OFFICE.

WILLIAM LORD BLISS, or BROOKLYN, NEW YORK.

' WINDOW.

Specification of Letters Patent.

Patented May 10, 1910.

Application filed September 14, 1905. Serial No. 278,358.

Be it known that I, WILLIAM LORD Buss,

a citizen of the United-States, residing at Brooklyn, Kingscounty, New York, have in-v vented. certain new and useful. Improvements in Windowsfor 'Cars,.,Cabs, &c., ofjf which the followingis afull, clear, and ex the proper resistance in order to obtain the desired degree of temperature when the available current is flowing. Since these wires arei'securely embedded in the glass in the process of manufacture, there is always danger'of the ends bein broken ofl by any {slight blow. There is alsodanger of the glass being fracturediby any uneven heat- My invention relatesto-wihdowsfparticii larlyi for cabs'and the-vestibules of cars.

The objectorthee-invention is to prov de awindow. uponwhich rain,-mist,sleet and ws theless' be s'tidngand not%'liable to fracture.

The invention consists".inimprovements collect, andfwhich will never the principles of which are illustrated inlthe accompanying single sheet of drawings.'

Briefly, it may be said to comprise the employment of a sheet or pane of glass havingembedded therein anumber of wires forming a part of an electric circuit, by which 7 F the glass is heatedifiThe glass is mounted matic switch is' provided in a frame .having coves at its ends for receiving the ends 0 the wires, and the ends of the wires are preferably connected by se arate short branches. For. windows w ich-a're adapted to be 0 ened, an autoor opening the circuit when the window is opened, so that current can flow only when the window is closed.

Y Figure'l is a perspective view of al'fr agment of a railway car having my invention appliedto the window in front ofthe motormjans box- Flg. 2 is a perspective view of a pane of glass having wires or electrical conductors embedded therein and connected in series. Fig. 3' is a similarview showing groups of wires in parallel. Fig. 4 is a vertical section of the window glass and sash embod 'ng the improvements of my invens which iS'fllOSBd upon closing the- .window car.

I tion. l ig. 5 is a view largely diagrammatic,

showing a vertical sliding window in a frame, with contacts for automaticall open-- ing the electric circuits. hin d or swinging horizontal sectiona' Fig. 6 s ows a window. Fig. 7 is a planfshowing a switch and opened upon o eningthe-window.

1 indicates avehicle', such -"as*-- ara-ilway 2 is a pane of glass sufliciently transplarent for the pu ose of vision therethrong 3-3 1n icates' wires forming electrical conductors. These should be of comparatively small diameter and designed to afford "through the glaj securing the glass in t connected v to circuit is complete and the apparatus wi ng. 'I therefore prefer -to' connect the ad- 'aceiit'ends of thexwires by-short lengths of fwire slightly separated from the end of the sheet of glass, so that the temperature of the connecting strip will not directly communicate to the end of the glass.

1. 35 and 6 are terminals of the wiring -.2 is a pane glass having embedded therein wires3 w ich are connected by the strips 4, arranged". so .that some of them are in arallelto better attain the temperature desired. 5 .-6 are the terminals of this series-parallel arrangement of wires. The temperature to which the glass is raised by the current flowing through the wires is not extremely high, it simply being necessary to maintain the glass at such a temper ature as will cause the moisture or sleet, etc., I

striking against the outer surface, to be vap orized reasonably fast.

7 represents the sash of the window, having shoulders 8-8 top and bottom, for holding the glass securely in its vertical position. 9'9-are grooves in the top and bottom of these sashes which permit of the ntroduction of the glasswith the protruding ends of the wire 3-3, without causing them to the, mains of the energizing circuit, and t able manual y controllable SWltCh.

rovided ifde'sired with a suit- 14 and15 are; spring contacts carried by I the window frame and connected to the terminals of the window c1rcu1t,-so that when the window is closed, as shown in. Fig. tlfi:

in operation. When the window is open the contacts 14 and 15 slip oil the terminals 12 and 13, and the window circuit is thus opened and deenergized.

In the form shown in Fig. .6, the sash 7 is hinged to the frame 16.

17-18 are contact members in the framev normally separated when the window is opening the wlndow.

open.

19 is a plunger and 20 a spring for holdilpg it in its extended position, as shown in 1g. 7. The circuit through the window wires passes through the hlnges 21 and 22. The automatic switch having contacts 17 and 18, is located in one branch of the circuit and automatically turns on and off the current as the window is closed or opened.

What I claim is: 1. In a window for cabs, vestibules, and the like, a pane of glass, conducting wires embedded therein, and means for automatically throwin the wires in circuit upon closing the win ow and opening the circuit on opening the window.

2. In a window for cabs, vehicles, etc., a sash having supporting shoulders and grooves beyond the shoulders, a pane of glass mounted in said sash positioned by said shoulders, conducting wires embedded in said glass, and havin into said grooves, 8115111651115 for energizing the circuit through said wires, for the purpose specified.

3. In a window construction, a stationary frame having contacts, a source of electrical energy connected to said contacts, a sash movable in said frame and having terminals adapted to electrically engage said frame contacts, a glass plate supported in said sash and a con uctivewire embedded in said glass plate,-the ends of the wire being housed and protected in said sash and connected to said sash terminals.

4. A window construction comprising, a frame, a sheet of transparent glass carried thereb a plurality of conducting wires embedde therein and arranged so as to furmsh a heating means throughout the glass butnot to obstruct the vision through the wmdow, meansfor supplying current sulficient to heat the wires -so as to prevent the formation or collection of ice on the exterior 'of the glass and means for automatically throwing the wires into circuit upon clos-' mg the window. I 5. A window construction comprising, a frame,

a sheet of transparent glass carried thereby, a plurality of conducting wires emtheir ends extendingbedded therein and arranged so as to furnish a heating means throughout the glass but not to obstruct the vision through the window, means for supplying current sufiicient to heat the wires so as to prevent the formation or collection of ice on the. exterior of the glass and means for automatically opening the circuit through the Wires on 6. A window construction comprising, a frame, a sheet of transparent glass carried thereby, a plurality of conducting Wires embedded therein and arranged so as to furnish a heating means throughout the glass but not to obstruct the vision through the Window, means for supplying current sufficient to heat the wires so as to prevent the formation or collection of ice on the exterior of the glass and means in the frame for altering the circuit conditions.

'7. A window construction comprising, a frame, a sheet of transparent glass carried thereby, a plurality of conducting wires embedded therein and arranged so as to furnish a heating means throughout the glass but not to obstruct the vision through the window, means for supplying current sufficient to heat the wires so as to prevent the formation or collection of ice on the exterior of the glass and sliding circuit contacts in said frame.

8. A window construction comprising, a frame, a sheet of transparent glass carried thereb a plurality of conducting wires embedde therein and arranged so as to furnish a heating means throughout the glass but not to obstruct the vision through the window, means for supplying current sufii cient to heat the wires so asto prevent the frame, a sheet of transparent glass carried,

thereb ,a plurality of conducting wires embedde therein and arranged so as to fur- .nish a heating means throughout the glass but not to obstruct the vision through the window, means for supplying current sufiicient to heat the wires so as to prevent the formation or collection of ice on the exteriorof the glass, said frame having one or more grooves into which the ends of said conductmg wires project and are housed.

WILLIAM LORD BLISS.

Witnesses: F. R. Bacon,

A. P. MUNNING. 

